:root {
  --bg: #f7f7f8;
  --fg: #1a1a2e;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #667eea;
  --primary-dark: #5568d3;
  --err: #dc2626;
  --ok: #059669;
  --radius: 8px;
}

* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg); color: var(--fg); margin: 0;
}

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 32px; background: #fff; border-bottom: 1px solid var(--border);
}
.topbar .brand { font-weight: 700; font-size: 20px; text-decoration: none; color: var(--fg); }
.topbar nav a, .topbar nav button.link {
  margin-left: 20px; text-decoration: none; color: var(--fg);
  background: none; border: none; font-size: 14px; cursor: pointer;
}
.topbar nav a:hover, .topbar nav button.link:hover { color: var(--primary); }

main { max-width: 1320px; margin: 0 auto; padding: 32px; }

.hero { text-align: center; padding: 40px 0; }
.hero h1 { font-size: 40px; margin: 0 0 8px; }
.hero p { color: var(--muted); font-size: 18px; margin: 0; }

.auth-box {
  max-width: 400px; margin: 0 auto; background: #fff;
  border: 1px solid var(--border); border-radius: var(--radius); padding: 24px;
}
.tabs { display: flex; gap: 8px; margin-bottom: 16px; border-bottom: 1px solid var(--border); }
.tab { background: none; border: none; padding: 10px 14px; cursor: pointer; color: var(--muted); font-size: 14px; }
.tab.active { color: var(--fg); font-weight: 600; border-bottom: 2px solid var(--primary); }
.tab-panel { display: none; flex-direction: column; gap: 12px; }
.tab-panel.active { display: flex; }

label { display: flex; flex-direction: column; font-size: 13px; color: var(--muted); gap: 4px; }
input, textarea {
  padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;
  font-family: inherit; background: #fff; color: var(--fg);
}
input:focus, textarea:focus { outline: none; border-color: var(--primary); }

button {
  background: var(--primary); color: #fff; border: none; padding: 10px 16px;
  border-radius: 6px; font-size: 14px; font-weight: 600; cursor: pointer;
}
button:hover { background: var(--primary-dark); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.err { color: var(--err); font-size: 13px; margin: 0; min-height: 18px; }
.ok  { color: var(--ok);  font-size: 13px; margin: 0; min-height: 18px; }
.muted { color: var(--muted); }
.hidden { display: none !important; }

.page-head { margin-bottom: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.page-head h1 { margin: 0; }

.range-picker { display: flex; gap: 4px; }
.range-btn {
  background: #fff; color: var(--fg); border: 1px solid var(--border);
  padding: 6px 14px; border-radius: 6px; font-size: 13px; font-weight: 500; cursor: pointer;
}
.range-btn:hover { border-color: var(--primary); color: var(--primary); }
.range-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 24px; margin-bottom: 24px;
}
.card h2 { margin-top: 0; font-size: 18px; }

.fresh-key {
  background: #ecfdf5; border: 1px solid #a7f3d0; padding: 12px;
  border-radius: 6px; margin-top: 16px;
}
.fresh-key code {
  display: block; margin-top: 8px; padding: 10px; background: #fff;
  border-radius: 4px; font-family: ui-monospace, Menlo, monospace;
  font-size: 13px; word-break: break-all;
}

table.keys { width: 100%; border-collapse: collapse; font-size: 14px; }
table.keys th, table.keys td {
  text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border);
}
table.keys th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; }
table.keys .origins { font-family: ui-monospace, Menlo, monospace; font-size: 12px; }
table.keys .revoke { background: none; color: var(--err); padding: 4px 8px; }
table.keys .revoke:hover { background: #fee2e2; }

.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 32px; }
.plan { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; text-align: center; }
.plan h3 { margin: 0 0 8px; }
.plan .price { font-size: 28px; font-weight: 700; margin: 0 0 16px; color: var(--primary); }
.plan ul { text-align: left; color: var(--muted); padding-left: 20px; font-size: 14px; }
.plan .subscribe { width: 100%; margin-top: 16px; }

.product-form { display: flex; flex-direction: column; gap: 10px; }
.product-form details.model-opts { font-size: 13px; }
.product-form details.model-opts summary { cursor: pointer; color: var(--muted); }
.product-form details.model-opts[open] { display: flex; flex-direction: column; gap: 8px; padding-top: 8px; }
.product-row {
  display: flex; align-items: center; padding: 12px; border-bottom: 1px solid var(--border);
}
.product-row:last-child { border-bottom: none; }
.delete-product { background: none; color: var(--err); border: 1px solid var(--err); padding: 4px 10px; border-radius: 4px; font-size: 12px; flex-shrink: 0; }
.delete-product:hover { background: #fee2e2; }

.usage-totals { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 24px; }
.stat { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .label { display: block; font-size: 12px; color: var(--muted); text-transform: uppercase; }
.stat .value { display: block; font-size: 28px; font-weight: 700; margin-top: 4px; }